The serious exchanges I know trade DOGE to BTC, USDT or ETH. I guess that you don't want the trades in 2 steps.

I looked into https://www.worldcoinindex.com/coin/dogecoin/exchanges and I've seen a very few that show DOGE/USD pair, but I don't know them. If you want to research, it can be a start, but make sure the trading pairs are real (not outdated) and ask others about those exchanges before depositing.